US5309818A - Method for the manufacture of a cooled piston - Google Patents

Method for the manufacture of a cooled piston Download PDF

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Publication number
US5309818A
US5309818A US08/003,841 US384193A US5309818A US 5309818 A US5309818 A US 5309818A US 384193 A US384193 A US 384193A US 5309818 A US5309818 A US 5309818A
Authority
US
United States
Prior art keywords
welding
walls
pin boss
cooling chamber
grooves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/003,841
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English (en)
Inventor
Jose A. C. Mendes
Jose M. M. Leites
Andre Lippai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Federal Mogul World Wide LLC
Original Assignee
Metal Leve SA Industria e Commercio
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metal Leve SA Industria e Commercio filed Critical Metal Leve SA Industria e Commercio
Priority to US08/003,841 priority Critical patent/US5309818A/en
Priority to US08/191,012 priority patent/US5394788A/en
Application granted granted Critical
Publication of US5309818A publication Critical patent/US5309818A/en
Assigned to AE GOETZE INC. - CAROLINA reassignment AE GOETZE INC. - CAROLINA CHANGE OF NAME TO AE GOETZE INC., - CAROLINA; CERTIFICATE OF AMENDMENT TO THE ARTICLES OF INCORPORATION DTD. JUNE 17, 1997 Assignors: METAL LEVE, INC.
Assigned to METAL LEVE INC. reassignment METAL LEVE INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: METAL LEVE INDUSTRIA E COMERCIO
Assigned to FEDERAL-MOGUL CAROLINA, INC. reassignment FEDERAL-MOGUL CAROLINA, INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: AE GOETZE, INC. - CAROLINA
Assigned to FEDERAL-MOGUL WORLD WIDE, INC. reassignment FEDERAL-MOGUL WORLD WIDE, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FEDERAL-MOGUL CAROLINA, INC.
Assigned to CITIBANK, N.A. AS COLLATERAL TRUSTEE reassignment CITIBANK, N.A. AS COLLATERAL TRUSTEE SECURITY AGREEMENT Assignors: FEDERAL-MOGUL WORLD WIDE, INC.
Anticipated expiration legal-status Critical
Assigned to FEDERAL-MOGUL WORLD WIDE LLC (FORMERLY FEDERAL-MOGUL WORLD WIDE, INC.) reassignment FEDERAL-MOGUL WORLD WIDE LLC (FORMERLY FEDERAL-MOGUL WORLD WIDE, INC.) RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITIBANK, N.A.
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/10—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/0069—Multi-part pistons the crown and skirt being interconnected by the gudgeon pin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/18—Pistons  having cooling means the means being a liquid or solid coolant, e.g. sodium, in a closed chamber in piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/001—One-piece pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/0015—Multi-part pistons
    • F02F3/003—Multi-part pistons the parts being connected by casting, brazing, welding or clamping
    • F02F2003/0061—Multi-part pistons the parts being connected by casting, brazing, welding or clamping by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F2200/00—Manufacturing
    • F02F2200/04—Forging of engine parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49249—Piston making
    • Y10T29/49252—Multi-element piston making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49249—Piston making
    • Y10T29/49256—Piston making with assembly or composite article making
    • Y10T29/49258—Piston making with assembly or composite article making with thermal barrier or heat flow provision

Definitions

  • the present invention relates to a piston head and the method for manufacturing particularly an articulated, or two-piece, piston head provided with a closed cooling chamber on its top portion.
  • the cooling chamber is of the so-called semi-open type, which is defined by a groove on the underside of the top and a tray provided on the skirt upper portion.
  • the cooling medium is supplied to the chamber by a nozzle, located at the engine crank-case, and circulates in the chamber. Due to the reciprocating motion of the piston the cooling medium splashes against the combustion bowl lower wall and the ring zone inner wall, thereby removing part of the heat generated in said regions.
  • the invention relates to a cooled piston head and method of manufacture, the piston head having a closed cooling chamber.
  • the piston head is formed of a top member, an intermediate member and a pin boss member joined to each other, such as by welding.
  • the top and intermediate members are provided with circumferential grooves which defines the closed cooling chamber.
  • the head is formed of a top member and a pin boss member joined together, such as by welding.
  • the closed cooling chamber is defined by circumferential grooves provided on both members.
  • FIG. 1 is a longitudinal section view of a preferred embodiment in which the piston head of the present invention is made from three preformed blanks;
  • FIG. 2 is a longitudinal section view of an alternate embodiment according to which the piston head of the invention is made from two preformed blanks;
  • FIG. 3 is a longitudinal section view of the piston head obtained from the blanks shown on FIG. 1 and 2 and according to the method of the invention.
  • a first preformed top member 1 is provided with a circumferential groove a and a central recess 1d.
  • a second intermediate preformed member 2 is provided with a circumferential groove 2a and a through hole 2d.
  • a third pin boss preformed member 3 is provided with a central recess 3a and a peripheral recess 3b.
  • Each of the members 1, 2 and 3 is preferably made from blanks which are produced from billets of suitable steel material.
  • the blanks are machined by any suitable process to form the various grooves and openings.
  • top member 1 and the intermediate member 2 are joined together preferably by welding, after juxtaposing walls 1b and 2b and ribs 1c and 2c.
  • Members 1 and 2 joined to each other are then joined such as by welding, to the pin boss member 3, whereby the rough piston head 4 of FIG. 3 is obtained.
  • the cooling chamber is defined by the juxtaposition of the open ends of the oppositely facing circumferential groove of the top member 1 and the circumferential groove 2a of the intermediate member 2.
  • a top preformed member 1 is provided with a circumferential groove 1a and a central recess 1d as in FIG. 1.
  • a pin boss preformed member 12 is provided with a circumferential groove 12a and central recess 12d. Thereafter, the top member 1 is joined, such as by welding, to the pin boss member 12 by the juxtaposition of walls 1b and 12b and the ribs 1c and 12c. The same rough head 4 of FIG. 3 is obtained.
  • the closed cooling chamber is defined by the juxtaposition of the open ends of the circumferential groove 1a of the top member 1 and the circumferential groove 12a of the pin boss member 12.
  • the parts can be made in the same manner as previously described.
  • the rough head 4 is subjected to final machining to final dimensions and the provision of the ring grooves and the pin boss holes.
  • the preferred method for carrying out the present invention is the friction welding process, however, other welding processes known in the art can be employed as well. Forging and sintering also can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
US08/003,841 1990-10-18 1993-01-11 Method for the manufacture of a cooled piston Expired - Lifetime US5309818A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US08/003,841 US5309818A (en) 1990-10-18 1993-01-11 Method for the manufacture of a cooled piston
US08/191,012 US5394788A (en) 1990-10-18 1994-02-01 Head for articulated piston

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
BR19005370 1990-10-18
BR909005370A BR9005370A (pt) 1990-10-18 1990-10-18 Processo de fabricacao de embolo refrigerado
US77790091A 1991-10-17 1991-10-17
US08/003,841 US5309818A (en) 1990-10-18 1993-01-11 Method for the manufacture of a cooled piston

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US77790091A Continuation 1990-10-18 1991-10-17

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US08/191,012 Division US5394788A (en) 1990-10-18 1994-02-01 Head for articulated piston

Publications (1)

Publication Number Publication Date
US5309818A true US5309818A (en) 1994-05-10

Family

ID=4050605

Family Applications (2)

Application Number Title Priority Date Filing Date
US08/003,841 Expired - Lifetime US5309818A (en) 1990-10-18 1993-01-11 Method for the manufacture of a cooled piston
US08/191,012 Expired - Lifetime US5394788A (en) 1990-10-18 1994-02-01 Head for articulated piston

Family Applications After (1)

Application Number Title Priority Date Filing Date
US08/191,012 Expired - Lifetime US5394788A (en) 1990-10-18 1994-02-01 Head for articulated piston

Country Status (8)

Country Link
US (2) US5309818A (sv)
AT (1) ATA208191A (sv)
BR (1) BR9005370A (sv)
DE (1) DE4134528C2 (sv)
FR (1) FR2668088A1 (sv)
GB (1) GB2249504B (sv)
PT (1) PT99283A (sv)
SE (1) SE508791C2 (sv)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642654A (en) * 1994-09-01 1997-07-01 Sundstrand Corporation Piston and method of manufacturing the same
US6026777A (en) * 1998-10-07 2000-02-22 Mahle Gmbh Piston having a barrel of forged steel and a cooling channel
WO2001027441A1 (en) 1999-10-08 2001-04-19 Federal-Mogul Corporation Dual gallery piston
US6532655B1 (en) * 1999-03-20 2003-03-18 Halla Climate Control Corp. Method of manufacturing hollow piston for compressors
EP1327089A1 (en) * 2000-10-18 2003-07-16 Federal-Mogul Corporation Multi-axially forged piston
US20040262297A1 (en) * 2002-11-06 2004-12-30 Carmo Ribeiro Piston and method of manufacture
US20050092739A1 (en) * 2003-11-04 2005-05-05 Carmo Ribeiro Piston and method of manufacture
US20080041333A1 (en) * 2006-08-18 2008-02-21 Mark Wayne Jarrett Engine piston having an insulating air gap
US20080127818A1 (en) * 2006-12-01 2008-06-05 Karl Schmidt Unisia, Inc. Piston produced from a single forged or cast piston blank
US20090007774A1 (en) * 2007-07-02 2009-01-08 Terence Savas Aircraft actuator piston
US20090194059A1 (en) * 2007-12-20 2009-08-06 Peter Grahle Piston for an internal combustion engine and method for its production
US20120037113A1 (en) * 2010-08-10 2012-02-16 Mahle International Gmbh Piston for an internal combustion engine and method for its production
US20130008407A1 (en) * 2009-12-18 2013-01-10 Mahle International Gmbh Piston for an internal combustion engine
US20130032103A1 (en) * 2011-08-04 2013-02-07 Miguel Azevedo Piston including a pair of cooling chambers
US8973484B2 (en) 2011-07-01 2015-03-10 Mahle Industries Inc. Piston with cooling gallery
US20150176523A1 (en) * 2012-07-18 2015-06-25 Mahle International Gmbh Method for producing a piston
CN105705758A (zh) * 2013-08-29 2016-06-22 费德罗-莫格尔公司 全裙式双面焊钢活塞
US9856820B2 (en) 2010-10-05 2018-01-02 Mahle International Gmbh Piston assembly

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US5735194A (en) * 1997-01-03 1998-04-07 Cochran; David M. Apparatus for separating chaff and roasting coffee and cocoa beans
US5934174A (en) * 1998-10-02 1999-08-10 Cummins Engine Company, Inc. Lightweight articulated piston head and method of making the piston head
US6155157A (en) * 1998-10-06 2000-12-05 Caterpillar Inc. Method and apparatus for making a two piece unitary piston
US6112642A (en) * 1998-10-06 2000-09-05 Caterpillar Inc. Method and apparatus for making a two piece unitary piston
US6588320B2 (en) 1999-12-30 2003-07-08 Federal-Mogul World Wide, Inc. Piston having uncoupled skirt
DE10007616B4 (de) * 2000-02-18 2008-08-28 Federal-Mogul Nürnberg GmbH Ringträger mit Kühlkanal
US6990980B2 (en) * 2000-09-28 2006-01-31 Invacare Corporation Carbon dioxide-based Bi-level CPAP control
DE10110889C1 (de) 2001-03-07 2002-10-02 Ks Kolbenschmidt Gmbh Verfahren zur Herstellung eines Kühlkanalkolbens, sowie ein nach dem Verfahren hergestellter Kühlkanalkolben
GB2375724B (en) * 2001-05-24 2005-01-12 Federal Mogul Technology Ltd Manufacturing pistons
DE10132447A1 (de) * 2001-07-04 2003-01-09 Ks Kolbenschmidt Gmbh Kolben mit angeschweißter Abdeckung des Kühlkanals
DE10206728B4 (de) * 2002-02-18 2006-08-24 Brueninghaus Hydromatik Gmbh Hohlkolben und Verfahren zu dessen Herstellung durch Sintern
DE10244512A1 (de) * 2002-09-25 2004-04-15 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
DE10244511A1 (de) * 2002-09-25 2004-04-15 Mahle Gmbh Mehrteiliger gekühlter Kolben für einen Verbrennungsmotor
ATE413936T1 (de) 2003-03-01 2008-11-15 Ks Kolbenschmidt Gmbh Herstellungsverfahren für einen kühlkanalkolben mit umformbarem bund
DE102004031513A1 (de) 2004-06-30 2006-01-26 Ks Kolbenschmidt Gmbh Verfahren zur Herstellung eines Kühlkanalkolbens für eine Brennkraftmaschine
DE102004038465A1 (de) * 2004-08-07 2006-02-23 Ks Kolbenschmidt Gmbh Kolben, insbesondere Kühlkanalkolben einer Brennkraftmaschine, mit zumindest drei Reibschweißzonen
DE102004061778A1 (de) * 2004-09-29 2006-04-06 Ks Kolbenschmidt Gmbh Einfach-Reibschweißung
US8011288B2 (en) 2005-09-17 2011-09-06 Ks Kolbenschmidt Gmbh Piston, especially cooling channel piston, comprising three friction-welded zones
WO2007031109A1 (de) * 2005-09-17 2007-03-22 Ks Kolbenschmidt Gmbh Kolben, insbesondere kühlkanalkolben einer brennkraftmaschine mit zumindest drei reibschweisszonen
DE102006053790A1 (de) * 2006-11-15 2008-05-21 Volkswagen Ag Verfahren zum Fügen eines Schaltrades mit einem Kupplungskörper, sowie Fügestellenstruktur
US8286852B2 (en) 2008-02-29 2012-10-16 Gesenkschmiede Schneider Gmbh Method of friction welding of a piston having a cooling duct
DE102008011922A1 (de) 2008-02-29 2009-09-03 Ks Kolbenschmidt Gmbh Kolben für Brennkraftmaschinen, hergestellt mittels eines Multi-Orbitalen Reibschweißverfahrens
DE202008017702U1 (de) * 2008-02-29 2011-04-07 Gesenkschmiede Schneider Gmbh Reibgeschweißtes Teil mit mindestens 2 Reibschweißstellen
DE102010051681B4 (de) 2010-11-17 2019-09-12 Daimler Ag Verfahren zur Herstellung eines Kühlkanalkolbens
MX2018013353A (es) 2016-05-04 2019-02-20 Ks Kolbenschmidt Gmbh Piston.

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Publication number Priority date Publication date Assignee Title
US3613521A (en) * 1968-11-07 1971-10-19 Komatsu Mfg Co Ltd Piston for internal combustion engine
DE2038022A1 (de) * 1970-07-31 1972-02-03 Arendt, Rosemarie, 3001 Krahenwin kel Kolben fur Verbrennungsmotoren
SU791983A1 (ru) * 1979-01-04 1981-01-02 Научно-исследовательский конструкторско-технологический институт тракторных и комбайновых двигателей Поршень дл двигател внутреннего сгорани
GB2122116A (en) * 1982-06-16 1984-01-11 Berchem & Schaberg Gmbh A process for the manufacture of a piston head for an assembled piston
DE3303984C1 (de) * 1983-02-05 1984-05-24 Mahle Gmbh, 7000 Stuttgart Mehrteiliger,fluessigkeitsgekuehlter Kolben fuer Verbrennungsmotoren
US5065508A (en) * 1988-10-26 1991-11-19 Metal Leve S.A. Industria E Comercio Two-piece piston and method of manufacturing the same

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642654A (en) * 1994-09-01 1997-07-01 Sundstrand Corporation Piston and method of manufacturing the same
US6026777A (en) * 1998-10-07 2000-02-22 Mahle Gmbh Piston having a barrel of forged steel and a cooling channel
US6532655B1 (en) * 1999-03-20 2003-03-18 Halla Climate Control Corp. Method of manufacturing hollow piston for compressors
WO2001027441A1 (en) 1999-10-08 2001-04-19 Federal-Mogul Corporation Dual gallery piston
US6477941B1 (en) * 1999-10-08 2002-11-12 Federal-Mogul World Wide, Inc. Dual gallery piston
US6651549B2 (en) 1999-10-08 2003-11-25 Federal-Mogul World Wide, Inc. Dual gallery piston
EP1222364B2 (en) † 1999-10-08 2018-03-28 Federal-Mogul Corporation Dual gallery piston
EP1327089A1 (en) * 2000-10-18 2003-07-16 Federal-Mogul Corporation Multi-axially forged piston
EP1327089A4 (en) * 2000-10-18 2005-11-09 Federal Mogul Corp MULTIMALLIALLY FORGED PISTON
US20040262297A1 (en) * 2002-11-06 2004-12-30 Carmo Ribeiro Piston and method of manufacture
US20050092739A1 (en) * 2003-11-04 2005-05-05 Carmo Ribeiro Piston and method of manufacture
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US9611804B2 (en) * 2012-07-18 2017-04-04 Mahle International Gmbh Method for producing a piston
CN105705758A (zh) * 2013-08-29 2016-06-22 费德罗-莫格尔公司 全裙式双面焊钢活塞
JP2016530446A (ja) * 2013-08-29 2016-09-29 フェデラル−モーグル コーポレイション 完全なスカートを伴う二重溶接された鋼ピストン

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FR2668088A1 (fr) 1992-04-24
SE508791C2 (sv) 1998-11-09
GB2249504B (en) 1994-08-03
GB9122211D0 (en) 1991-11-27
US5394788A (en) 1995-03-07
DE4134528A1 (de) 1992-05-07
DE4134528C2 (de) 2002-01-31
ATA208191A (de) 1996-12-15
SE9103043D0 (sv) 1991-10-18
GB2249504A (en) 1992-05-13
SE9103043L (sv) 1992-04-19
FR2668088B1 (sv) 1995-03-31
PT99283A (pt) 1993-10-29
BR9005370A (pt) 1992-06-16

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